1. Choose your friends wisely

Since decision-making is both faulty and exhausting, he argues that picking your social circle maximizes your chance of reaching happy, fulfilling outcomes.

It's based on research that has found people's brain waves sync up when they're in each other's presence. So if you want to become a funnier or more physically fit person, Cerf's advice is to seek out funny or physically fit friends. You'll naturally start becoming more like them.

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2. Keep track of your luck

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Cerf argues that people are much luckier than they think. Each semester, the assistant professor of marketing encourages his students at Northwestern to keep track of times they took a risk and it paid off.

Every time they speed on the highway and don't get a ticket, they make a note. Every time they do get a ticket, they make a note. At the end of the month, they can divide their bad outcomes by their good ones. Often, people are surprised to see just how lucky they were, Cerf said.

"You see that you were lucky," Cerf told Business Insider. "Most of us are lucky. That's the point."

Cerf's advice is to stop basing day-to-day choices about fitness and diet on individual numbers. They too easily become the goals themselves instead of a metric for tracking progress.

In his own life, Cerf covers the number on his bathroom scale. The scale logs each weigh-in, but he looks just once at the numbers at end of the week. He said it helps him think less about numbers and more about the bigger trend of weight loss.

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4. Create the right budget for you

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As a neuroscientist obsessed with choice, money is one of Cerf's biggest interests. He's found that a lot of people struggle to budget properly because they're up against so many timescales for spending and saving.

Paychecks, for example, tend to come twice a month. Bills are paid once a month. People go grocery shopping perhaps four times a month, but eat three meals a day. Cerf's advice for making sense of all these scales is to adjust budgeting around just one.

It might take a few months of experimenting with allotting per-diems or lump sums at the start of the month. But Cerf said the result is less stress and a greater sense of control over finances.

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5. Outsource your dating

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Since Cerf views human decision-making as inherently faulty, he isn't surprised when people have trouble finding the right romantic partner. Often, they are too close to the situation to have any clarity.

To find love, Cerf said it's best to stick to the old wisdom of relying on friends as matchmakers. They're close to you emotionally, but not so close that they will lose perspective. Apps like Wingman— basically Tinder except you champion a friend, not yourself — help the process.

"Outsource the dating," Cerf said.

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6. Do good for others

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Even if you make the right choices for yourself, research has found that you'll probably derive more happiness from helping others, Cerf said.

The wisdom applies to spending money on people or donating your time to a cause. In both cases, giving an equivalent amount to others that you might otherwise have given yourself has been shown to boost happiness to a greater degree.